(Encyclopedia) Browne, Sir Thomas, 1605–82, English author and physician, b. London, educated at Oxford and abroad, knighted (1671) by Charles II. His Religio Medici, in which Browne attempted to…
Uncovering African RootsDNA Tests, New Technology Reveal African Heritage
Photograph of slave cabin and occupants near Eufala, Alabama. (Source: Library of Congress)…
HOW DO SATELLITES STAY UP IN SPACE? SATELLITE ORBITSFIND OUT MOREA spacecraft that travels in a steady path, or orbit, around Earth is called a satellite. Satellites receive and send on…
(Encyclopedia) Reformed churches, in a general sense, all Protestant churches that claim a beginning in the Reformation. In more restricted and more usual historical usage, Reformed churches are…
(Encyclopedia) decay of organic matter or putrefaction, process whereby heterotrophic organisms, including some bacteria, fungi, saprophytic plants, and lower animals, utilize the remains of once-…
ECG: Measuring a BeatAnatomy and PhysiologyThe HeartAnatomy of the HeartThe Four ChambersThe Heart's Own BloodECG: Measuring a Beat The electrical conductivity that is an inherent part of the…
The Take on TemperatureWeatherMeasuring the AtmosphereThe Take on TemperatureIs the Pressure Getting to You?The Wind in the WillowsIt's Not the Heat, It's the HumidityMeasuring the RainPlacing the…
(Encyclopedia) reaper, early farm machine drawn by draft animals or tractor and used to harvest grain. Its historical predecessors were the sickle and the cradle scythe, which are still used in some…
(Encyclopedia) TheodoretTheodoretthēŏdˈərĕt [key], c.393–c.458, Syrian churchman and theologian. He was a monk of Apamaea and a lifelong friend of Nestorius. In 423 he went unwillingly to be bishop…
(Encyclopedia) harvester, farm machine that mechanically harvests a crop. Small-grain harvesting has been mechanized to a certain extent since early times. In the modern period the first harvester to…
